$heigh:100px;
div {
    .item{
        height: $heigh;
        width: 100%;
        display: table-cell;
        text-align: center;
        vertical-align: middle;
        img { 
            position: flex;
            align-self: center;
            width: 345px;
            height: 180px;
        }
    }
    .dh{
        background-color: rgb(254, 254, 3);
    }
    .active{
        color: red;
    }
  

}